Door cleaner for coke oven

ABSTRACT

The door cleaner is capable of automatically scraping a door&#39;&#39;s sloping edge, knife edge and recessed inside surface to remove tar and the like adhered thereto. The cleaner comprises a substantially rectangular support frame arranged to surround a coke oven door sealing member. A pair of carriers are mounted on the frame and engage with a guide thereon for movement along the frame. Each carrier has a motor and reduction gearing driving a respective sprocket engaged with a fixed chain on the frame, to move the carriers along the frame, the two carriers being interconnected by another chain so that they move in respective opposite directions. Each carrier has a pair of scraper devices thereon each pivotally mounted at a respective end thereof and extending inwardly from the carrier. A cutter device is mounted on each carrier at the inner side thereof and includes cutter means rotatable about horizontal axes extending substantially parallel to the adjacent sloping edge surface of the sealing member. The cutter device is pivoted intermediate its ends, and has a rotary cutter on each end, and the device is controlled, by a hydraulic rotary cylinder, to engage either the upper or the lower cutter with a door surface.

July 2,

,Filed Aug. 25, 1972 NAGAYosHl KoNNo l DOOR CLEANER FOR COKE OVEN 2 Sheets-Sheet 1 July 2, 1974 NAGAYosl-u KoNNo 3822A@ DOOR CLEANER FOR .COKE GVEN .Filed Aug. 25, 1972 2 Sheets-Sheet 2 F/Qj ril; I #i Ligt.-

3,822,191 Patented July 2, 1974 'States Patent O1 hcc 3,822,191 DOOR CLEANER FOR COKE OVEN Nagayoshi Konno, 28-2, 1chome, Asahicho, Nerima-ku, Tokyo, Japan Filed Aug. 25, 1972, Ser. No. 283,922 Claims priority, application Japan, Apr. 10, 1972,

47/41,385 Int. Cl. B23d 79/00 U.S. Cl. 202-241 16 Claims ABSTRACT OF THE DISCLOSURE The door cleaner is capable of automatically scraping a doors sloping edge, knife edge and recessed inside surface to remove tar and the like adhered thereto. The cleaner comprises a substantially rectangular support frame arranged to surround a coke oven door sealing member. A pair of carriers are mounted on the frame and engage with a guide thereon vfor movement along the frame. Each carrier hasta motor and reduction gearing driving a respective sprocket engaged with a fixed chain on the frame, to move the carriers along the frame, the two carriers being interconnected by another chain so that they move in respective opposite directions. Each carrier has a pair of scraper devices thereon each pivotally mounted at arespective end thereof and extending inwardly from the carrier. A cutter device is mounted on each carrier at the inner side thereof and includes cutter means rotatable about horizontal axes extending substantially parallel to the adjacent sloping edge surface of thesealing member. The cutter device is pivoted intermediate its ends, and has a rotary cutter on each end, and the device is controlled, by a hydraulic rotary cylinder, to engage either the upper or the lower cutter with a door surface.

FIELD AND BACKGROUND OF THE INVENTION i This invention relates to a door cleaner for coke oven doors. The conventional horizontal chamber coke loven is equipped with a door at each of its opposite ends, namely, the pusher side and the quencher side. Each door, to which much tar and the like adhere when the coal is baked to form coke, must be cleaned for the next course of coking operation. In particular, to close each door tightly, thorough cleaning of the doors sloping edge, knife edge and intermediate recessed inside surface, is necessary.

SUMMARY OF THE INVENTION This invention provides a new and useful cleanerwhich is capable of scraping particularly the doors sloping intermediate recessed inside surface edge, knife edge and automatically to remove the tar and the like completely.

In accordance with the invention, the door cleaner includes a substantially rectangular support frame arranged to surround the door sealing member of a coke oven door, and formed with a guide extending therealong. A pair of carriers are mounted on the frame and engage with the guide for movement along the frame, the two carriers being interconnected by a chain or the like. Each carrier has a motor and a reduction gearing driving a sprocketengageable with a second and fixed chain on the frame to v a rotatable cutter at each of its opposite ends, with a hydraulic rotary cylinder being provided to rotate the respective lcutter through a small angle to bring either the upper or the lower rotatable cutter into engagement with a door surface.

-Each scraper device is capable of making a close contact with the knife edge and the adajcent recessed inside surface of the door. 'For this purpose, each scraper device is movable not only toward and away from the surface of the door to be scraped but also laterally of itself.

For an understanding of the principles of the invention, reference is made to the following description of a typical embodiment thereof as illustrated in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS In the drawings:

FIG. 1 is a front view of the door cleaner made according to a rst embodiment of this invention;

FIG. 2 is a partial front view of the door cleaner showing the uppermost limit to be cleaned;

FIG. 3 is a side view of the door cleaner;

FIG. 4 is a cross-sectional view of the door cleaner, taken generally along the section line IV-IV of FIG. 1 the left half of which shows the scraper device and the right half the radial cutter device respectively;

'FIG. 5 is a schematic diagram showing the radial cutter device and the hydraulic system; and

FIG. 6 is an enlarged veiw of the scraper device.

DESCRIPTION OF PREFERRED EMBODIMENT Referring to FIG. 1, a carrier (3), which is connected with another carrier (3') by the chain (2), is placed on the guide (6) formed along the full length of the vertical frame (1).

The respective carriers (3) and (3') are movable along the full length of the associated vertical guides (6) by respective sprocket wheels (34) and (34'), which engage respective chains (33) xed in position and extending along each vertical leg of the frame (1). As the carriers are interconnected by the chain (2), they move in respective opposite directions and, for this purpose, the sprockets (34) and (34') are rotatable in respective opposite directions by respective hydraulic motors (4) fixed on the back or outer side of each carrier. Thus, when sprocket (34) of carrier (3) is rotated counterclockwise, carrier (3) moves upwardly along the frame (1) and carrier (3') moves downwardly along this frame.

An oscillatable radial cutter device is oscillatably mounted on the center projection of each substantially E- shaped carrier (3) and (3'). A horizontally oriented rotary hy.- draulic cylinder ('7) is operable to oscillate each cutter device through a small angle, and each cutter device carries a pair of rotatable radial cutters (9) and (9') each rotatably mounted at the respective end of the cutter device. These cutters, which have a cylindrical shape, are rotatable about axes which extend substantially parallel to the adjacent sloping edge surfaces of the sealing member to be cleaned, and each radial cutter has a plurality "of claws (8) on its periphery. Simultaneously with energization of each hydraulic motor (4), the respective rotary cylinders (7) are energized to oscillate the respective cutter device to move the lower radial cutter (9') into close contact with the sloping door surface (a), in the direction of the arrow x, when the associated carrier moves upwardly. The upper radial cutter (9) is swung into contact with the surface (a) in the direction of the arrow y when the associated carrier is moved downwardly. During such movement, the radial cutters are rotated by the respective hydraulic driving motors (4) in a manner described more fully hereinafter.

. Referring to FIG. 3, respective arms (10) and (10'). are pivotally secured to the upper and lower ends f each carrier (3) and (3'), and the free end of each pivoted arm carries a respective scraper device including a scraper (11) at one end of a shifting rod (12), as shown more clearly in FIGS. and 6. Each shifting rod (12) is axially displaceable by a pivoted lever (1'5) articulated to a plunger (14) of a respective hydraulic cylinder 13) fixed to the associated arm are (10'). Each rod (12) can also be displaced bodily sidewards by the action of a respective fixed cam (16), as shown in FIG. 4, as a roller (1'8) at the free end of a lever (15) rolls over the cam from the lower portion thereof upwardly.

It is particularly to be noted that each lever 15) is pivotably secured to the associated arm (10) or (10') at a point (not shown) between the free end of the lever 15) and its connection with the plunger. This pivoting point is arranged depending on the distance between the door side and the scraper device, so that the movement of the lever end, with which the scraper device is connected, can be enlarged in relation to the movement of the other end.

As the plunger (14) is pulled by the action of the hydraulic cylinder (13), the cutter (11) approaches toward the knife edge (b) keeping contact with the door side (a) by the action of the cam (16) and then the cutter (11) enters into the recessed inside surface (c) while, a part of the scraper (11) contacts closely to the tip of the knife the cleaner, as shown partly in IFIG. 4.

Each carrier is provided with roller guides (21), (22) and (23) at each end which are engageable with scraper guides (19) and (20) on the frame. Each lever (15) is also associated with a return spring (24) for biasing the associated rod (12) in a return direction.

As best seen FIGS. 4 and 5, radial cutters (8) are driven from motors (4) through respective reduction gearing assemblies (35). The reduction gearing includes an intermediate gear (26) meshing with a pair of gears (25) and (27) each secured to a respective cutter (8). The gears (26) are driven by motor (4) through the reduction gearing (3S) more particularly illustrated in FIG. 4. Furthermore, and as best seen in FIG. 4, each radial cutter is operatively associated with a stop (28) which also serves as a scraper. FIGS. 1, 2 and 3 also illustrate the sprockets (30) and (32) around which the chain (2), interconnecting the two carriers, is trained.

Before the operation of cleaning of the oven door, the carriers (3), (3') are to be located in the middle part of the .vertical frame (1), (1'), with the radial cutter devices (29) oriented vertically to remain stationary and with the scrapers (11) 11') being fully pulled back. By doing so, the space between each scraper of the both carriers can be made wide enough to allow a door to enter the cleaner, as shown partly in FIG. 4.

After setting a door properly in the supporting frame, both the hydraulic driving motor (4) and the hydraulic cylinders (13) (13') are started in operation. As the hydraulic motors (4) operate the carriers (3) (3') move up and down, and the hydraulic rotary cylinder (7) also moves to control the radial cutters, as shown in FIG. 5. Thus, the lower radial cutter (9') of the ascending carrier is pressed toward the door side (a) with a powerful but low speed rotation in the direction of the arrow x. On the other hand, the upper radial cutter (9) of the descending carrier is also pressed toward the door side (a) to rotate in the direction of arrow y in the same manner.

As the hydraulic cylinders (13) (13') start to work, the scraper devices are pulled close to the door (31), the scrapers (11) (11') are moved close to the knife edges (b) to go into the recessed inside surface (c) and the rollers (22) engage into the scraper guides (19).

The rotating direction of the hydraulic motors changes automatically to reverse the carrier movement when the latter reaches the uppermost or lowermost limit.

As shown in FIG. 2 the arms (10), (10') tilt inward along the scraper guide (20) to clean a half of the knife edge and the adjacent area respectively, when the carriers (3) (3') approach the uppermost or lowermost limits.

The up and down movement of the radial cutters pressed against the door sides, scrapes tar and the like completely off the door sides. As the sharp claws scrape fully, a single travel of the carrier up and down along the vertical frame is efficient for cleaning the door.

The shape of the radial cutter is variable depending on the sloping degrees of the door edge, and a set of several radial cutters to be fixed on the same axle, may be also employed.

The stopper-scraper (28) of the radial cutter device facing to the knife edge can scrape the tar and the like in a liquid form. The supporting frame is supported by a supporter (not shown in the drawing) which is per se movable to and fro.

What I claim is:

1. A coke oven door cleaner, for cleaning a coke oven door having a sealing member with a sloping edge surface, a knife edge, and a recessed surface between the sloping edge surface and the knife edge, said cleaner comprising, in combination, a substantially rectangular support frame arranged to surround the door sealing member and formed with a `guide extending therealong; a pair of carriers mounted on said frame and engaged with said guide for movement along said frame; driving means, including a motor and reduction gearing on each carrier, operable to move said carriers in guided relation along said frame; a respective pair of scraper devices on each carrier, each scraper device being pivotally mounted on the associated carrier at a respective end thereof and extending inwardly from the associated carrier; and a cutter device mounted on each carrier at the inner side thereof and including cutter means rotatable about horizontal axes extending substantially parallel to the adjacent sloping edge surfaces of the sealing member. l

2. A coke oven door cleaner according to claim 1, in which said motor is a hydraulic driving motor.

3. A coke oven door cleaner according to claim 1, including means mounting each scraper device for movement in two mutually perpendicular directions, movement in one direction engaging each scraper device with the lsloping edge surface of the door and movement in the other direction engaging each scraper device with the knife edge whereby the recessed surface can be scraped at the same time as the sloping edge surface and the knife edge are scraped.

4. A coke oven door cleaner according to claim 1, in which said cutter device comprises two rotatable radial cutters with several claws on the periphery thereof.

5. A coke oven door cleaner according to claim 1, in which each cutter device is pivotally mounted on the associated carrier at a pivot intermediate the ends of the cutter device; each cutter device having a pair of cutters, one at each end thereof; and a respective hydraulic rotary cylinder operatively connected to each cutter device and operable to move the same angularly in opposite directions to engage a selected one of the two cutters with the door to be cleaned.

6. A coke oven door cleaner according to claim 5, in which each cutter device comprises two rotatable radial cutters with several claws on the periphery thereof.

7. A coke oven door cleaner according to claim 3, in which said motor is a hydraulic driving motor.

8. A coke oven door cleaner according to claim 2, in which each cutter device comprises two rotatable radial cutters with several claws on the periphery thereof.

9. A coke oven door cleaner according to claim 5, in which said motor is a hydraulic driving motor.

10. A coke oven door cleaner according to claim 5, in which said motor is a hydraulic driving motor; said cutter device comprising two rotatable radial cutters with several claws on the periphery thereof.

11. A coke oven door cleaner according to claim 5, in which each cutter device is pivotally connected, intermediate its ends, to the associated carrier and comprises a pair of cutters, one on each end thereof; and a respective hydraulic rotary cylinder operatively associated with each cutter device and operable to pivot the same angularly to bring a respective one of the two cutters into operative relation with a door surface.

12. A coke oven door cleaner according to claim 6, in which said motor is a hydraulic driving motor.

13. A coke oven door cleaner according to claim 11, in which said motor is a hydraulic driving motor.

14. A coke oven door cleaner according to claim 1, including sprockets on said support frame; and a chain trained over said sprockets and having each end connected to a respective carrier, whereby said carriers move in respective opposite directions.

15. A coke oven door cleaner according to claim 1, in which said driving means comprises, for each carrier, a chain xed to said support frame and extending longitudinally thereof; and a respective sprocket driven by each motor and reduction gearing and engaged with said chain.

References Cited UNITED STATES PATENTS 3,343,193 9/1967 Ciochetto 15-93 A 3,448,475 6/1969 Stanke 15-93 A FOREIGN PATENTS 867,761 S/ 1961 Great Britain 202-241 NORMAN YUDKOFF, Primary Examiner D. H. SANDERS, Assistant Examiner U.S. Cl. X.R. 15-93 A 

